全站仪在公路导线和中线测量中的应用
effort, and the results meet the accuracy requirements.
2.3 Total Measurement Application of functional skills
Although the level of total station measurements cumbersome procedures, and accuracy is not high, but sometimes the function of height can be measured effectively. As in Mountain edge streamlet line measurement of change, some routes in several midline point on the mountain, if measured by leveling to the elevation of these points, based on past experience, Level turn to the hilltop after two previous instruments Easily lead to error is too large, resulting in closure between the standard points. Our approach is: in the mountains at the foot of the election of a fixed reference point for comparison, With total station read out the points of Z-axis height, and then release with Total Station in the midline point of these hills, when they point the way to measure the Z-axis height can be calculated in relation to these points, the reference point the foot of the hill .The elevation, so that measured by leveling the height of the reference point, coupled with the height difference between them, they will have the hills on the center line of the elevation points. This the benefit is: does not affect the measurement accuracy has been the high point of the mountain at the same time, the way to avoid leveling easily lead to the standard of the hill between the occurrence of non-closure.
2.4 Total Station with other measurement methods used in conjunction
Measuring Total Station can be centerline to improve the measurement speed, but because of its own measurement of the use of the mechanism of making it have some limitations, such as the barrier, when, as often required when moving points, in particular Measurement in the plains, as station equipment to move a lot of time to delay, the impact of the measurements. In fact, the process of laying the center line does not necessarily have to rely too much on total station, in conjunction with the previous tape under a flower, \bar\Law. We micro-hill in the plains areas, especially in areas with more line segments, the method of measuring the center line is: only used to take control of Total Station Point, that is, line segments, one for every 300 m center line, the curve point above the center line of the release by the Total Station, straight from the
5
全站仪在公路导线和中线测量中的应用
points A, B 2 personal expertise lay in front of the middle group, after the laying of A continue to the front
300 m down a center line point B to stay under to take a flower behind the center line group when the \View\from the center line group using binoculars, measuring tape, flower clubs, walkie-talkies and other tools to \The full Miriam released the centerline station point for review by 2:00 after passing in front of 300 m A Department Total points also to the well, B to A, as the Department before the legislature, A continues to move forward, it can be the middle of Total Station through the walkie-talkie Midline group to review their use of \point release. Another very important point is: Total removal of the time points chosen the best straight Segment on the benefits of such a group is not waiting for equipment to move the center line and lay-off points. We use this method in 23 provincial line Nanyang City of Henan Dengzhou Habitat Bangladesh floor to paragraph (plain micro Hill area) the conversion of secondary roads Measurement of the center line, hit a one-day speed of the laying of 10 km.
3 Conclusion
Total Station in China in recent years, there is only a matter of universal application of a large area has just begun, but it has brought us convenience is of very significant. In the use of Total Station, will have their own experiences, experience skills, if each user will be able to devote their own experiences, for both of us will be a big asset.
References
[1] People's Republic of industry standards. JTJ 061 -99 investigation norms Road. Beijing: People's Traffic Press, 1999
[2] Nie so. Total Station with the measurement of high-grade highways. Beijing. People's Traffic Press, 1999.287 ~ 300
6
全站仪在公路导线和中线测量中的应用
——From: TRANSPORTATION SCIENCE & TECHNOLOGY,2005.5
7
